I have designed this adapter for the base of the Darth Vader bust by the great designer Eastman. This way everyone can add what they want and personalize the bust. The adapter hole measures 20mm x 2mm x 10mm and the poster holes are already adapted so that it has enough tolerance and fits easily. I add the editable Fusuión 360 file so that everyone can edit it to their liking. The design that I upload is the standard one in English but the one in the photo is in Spanish and personalized, this way anyone can do it just like me since it is very easy to edit in Fusion 360.
I hope it is useful to you and you can ask me if you have any questions without any problem.